how to think like a computer scientist python 3

... declare a variable, you create a named storage location 14 CHAPTER 2 VARIABLES AND TYPES • When you make an assignment to a variable,... twice Alternatively, if we had a char variable, ... a high-level language into a low-level language, all at once, in preparation for later... language: A programming language like C++ that is designed to be easy for humans to read and ... important should become clear soon 2.3 VARIABLES 2.3 13 Variables One of the most powerful features of a programming language is the ability to manipulate variables A variable is a named

Ngày tải lên: 23/03/2014, 22:21

... Glossary Exercises 1 3 4 10 10 11 13 13 14 15 15 16 17 17 18 19 v vi Contents Functions 21 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 21 21 22 23 24 26 26 27 28 29 30 31 31 ... will remain, accurate or appropriate Contents Preface page xi The Way of the Program 1.1 The Python Programming Language 1.2 What Is a Program? 1.3 What Is Debugging? 1.3.1 Syntax Errors 1.3.2 Runtime ... Encapsulation Generalization Interface Design Refactoring A Development Plan Docstring Debugging Glossary Exercises 35 36 37 38 39 40 41 42 43 43 44 44 Conditionals and Recursion 46 5.1 5.2 5.3

Ngày tải lên: 13/04/2019, 01:44

... goal is not just to make the program work The goal is to learn how to make the program work Index abecedarian, 72, 83 abs function, 52 absolute path, 139, 145 access, 89 accumulator, 100 histogram, ... book, and that it helps you learn to program and think, at least a little bit, like a computer scientist Allen B Downey Needham MA Allen Downey is an Associate Professor of Computer Science at the ... Think Python How to Think Like a Computer Scientist Version 1.1.21 Think Python How to Think Like a Computer Scientist Version 1.1.21 Allen Downey Green Tea Press Needham, Massachusetts

Ngày tải lên: 13/04/2019, 01:46

... root, 82 aliasing, 112, 113, 118, 173, 176, 199 copying to avoid, 116 alphabet, 47 alternative execution, 51 ambiguity, anagram, 118 anagram set, 145, 165 analysis of algorithms, 243 analysis of ... Puzzler, 103, 103, 103, 133, 145 Pythagorean theorem, 62 Python 3, 8, 16, 55, 131, 138 Python debugger (pdb), 238 Python Imaging Library (PIL), 230 Q quadratic growth, 245 quotation mark, 8, 13, 13, ... 219, 223, 225, 225, 227, 229 Canvas coordinate, 220, 227 Canvas item, 220 266 | Index Canvas object, 179 Canvas widget, 219 Car Talk, 103, 103, 103, 133, 145 Card class, 202, 263 card, playing,

Ngày tải lên: 16/11/2019, 21:05

... root, 82 aliasing, 112, 113, 118, 173, 176, 199 copying to avoid, 116 alphabet, 47 alternative execution, 51 ambiguity, anagram, 118 anagram set, 145, 165 analysis of algorithms, 243 analysis of ... Puzzler, 103, 103, 103, 133, 145 Pythagorean theorem, 62 Python 3, 8, 16, 55, 131, 138 Python debugger (pdb), 238 Python Imaging Library (PIL), 230 Q quadratic growth, 245 quotation mark, 8, 13, 13, ... 219, 223, 225, 225, 227, 229 Canvas coordinate, 220, 227 Canvas item, 220 266 | Index Canvas object, 179 Canvas widget, 219 Car Talk, 103, 103, 103, 133, 145 Card class, 202, 263 card, playing,

Ngày tải lên: 17/11/2019, 07:31

... 0.983333333333 By making the denominator afloat, we force Python to floating-point division 3.4 Math functions In mathematics, you have probably seen functions likesinandlog, and you have learned ... class Card: suitList = ["Clubs", "Diamonds", "Hearts", "Spades"] rankList = ["narf", "Ace", "2", "3", "4", "5", ... There are two possible states: a b "banana" "banana" a b "banana" In one case,aandbrefer to two different things that have the same value In the second case, they

Ngày tải lên: 09/02/2021, 03:59

... of a programming language is the ability to manipulate variables A variable is a named location that stores a value Values are things that can be printed, stored and (as we’ll see later) ... language: A programming language like Java that is designed to be easy for humans to read and write low-level language: A programming language that is designed to be easy for a ... or computer programs All programming languages are formal languages 10 Chapter 1 The way of the program natural language: Any of the languages people speak that have evolved naturally portability:

Ngày tải lên: 13/06/2014, 16:20

... variables A variable is a named location that stores a value... and interpreted Instead of translating Java programs into machine language, the Java compiler 1.2 What is a program? 3 generates ... programs All programming languages are formal languages natural language: Any of the languages people speak that have evolved naturally portability: A property of a program that can run ... name of the variable appears outside the box and the value appears inside As a general rule, a variable has to have the same type as the value... misunderstandings, natural languages employ

Ngày tải lên: 01/08/2014, 23:20

... humans to read and write low-level language: A programming language that is designed to be easy for a computer to run Also called “machine language” or “assembly language.” formal language: ... redundant Formal languages are more concise literalness: Natural languages are full of idiom and metaphor Formal languages mean exactly what they say People who grow up speaking a natural language ... often have a hard time adjusting to. .. natural language: Any of the languages people speak that have evolved naturally portability: A property of a program that can run on more than one

Ngày tải lên: 22/04/2015, 07:37

... Expressions and Statements One of the most powerful features of a programming language is the ability to manipulate variables A variable is a name that refers to a value. Assignment Statements An assignment ... evolved naturally Formal languages are languages that are designed by people for specific applications. For example, the notation that mathematicians use is a formal language that is partic‐ularly ... McGhie suggested a clarification • Andrea Zanella translated the book into Italian, and sent a number of corrections alongthe way • Many, many thanks to Melissa Lewis and Luciano Ramalho for excellent

Ngày tải lên: 26/04/2024, 20:12

... http://www.thinkpython2.com Preface The strange history of this book In January 1999 I was preparing to teach an introductory programming class in Java I had taught it three times and I was getting ... Think Python How to Think Like a Computer Scientist 2nd Edition, Version 2.4.0 Think Python How to Think Like a Computer Scientist 2nd Edition, Version 2.4.0 Allen Downey Green Tea Press ... College Acknowledgments Many thanks to Jeff Elkner, who translated my Java book into Python, which got this project started and introduced me to what has turned out to be my favorite language Thanks

Ngày tải lên: 23/02/2021, 21:53

... mathematical ideas or computer programs; all programming languages are formal languages token:... Linus’s earlier projects was a program that would switch between printing AAAA and BBBB This later ... Formal and natural languages Natural languages are the languages people speak, such as English, Spanish, and French... of a computer program is unambiguous and literal, and can be understood entirely ... book In January 1999 I was preparing to teach an introductory programming class in Java. I had taught it three times and I was getting frustrated. The failure rate in the class was too high and,

Ngày tải lên: 28/03/2014, 22:20

... This page intentionally left blank How to Think Like a Mathematician Looking for a head start in your undergraduate degree in mathematics? Maybe you’ve already started your degree and feel ... you’re taking a subject that requires logic such as computer science, philosophy or linguistics How to Think Like a Mathematician A Companion to Undergraduate Mathematics KE VIN H OUSTON University ... a mathematician Essential for any starting undergraduate in mathematics, this book can also help if you’re studying engineering or physics and need access to undergraduate mathematics topics,

Ngày tải lên: 30/03/2020, 20:13

... diagrams To keep track of which variables can be used where, it is sometimes useful to draw a stack diagram. Like state diagrams, stack diagrams show the value of each variable, but they also show ... importantly: Programming languages are formal languages that have been designed to express computations. Formal languages tend to have strict rules about syntax. For example, 3 + 3 = 6 is a syntactically ... Formal and natural languages 5 1.4 Formal and natural languages Natural languages are the languages people speak, such as English, Spanish, and French. They were not designed by people (although...

Ngày tải lên: 06/03/2014, 16:20

... computer programs. All programming languages are formal languages. natural language: Any of the languages people speak that have evolved nat- urally. portability: A property of a program that can run ... seen are declarations, assignments, and print state- ments. declaration: A statement that creates a new variable and determines its type. assignment: A statement that assigns a value to a variable. expression: ... simplest way to convert a floating-point value to an integer is to use a typecast. Typecasting is so called because it allows you to take a value that belongs to one type and “cast” it into another...

Ngày tải lên: 19/01/2014, 16:20

... syntactic structure of a program, analo- gous to a word in a natural language. parse: To examine a program and analyze the syntactic s tructure. print statement: An instruction that causes the Python ... than what the programmer intended. semantics: The meaning of a program. natural language: Any one of the languages that people speak that evolved naturally. formal language: Any one of the languages ... Operators and operands Operators are special symbols that represent computations like addition and multiplication. The values the operator uses are called operands. The following are all legal Python...

Ngày tải lên: 14/03/2014, 15:20

... in order to interview like a top MBA. In my case, I was a mathematics and economics major in college, and then I taught math for a number of years. When I was ready to make the transition to become a ... rec- ommend How to Interview Like a Top MBA!” —D ALE L E F EBVRE MIT graduate, Harvard Business School and Harvard Law School graduate Former McKinsey & Company Consultant Managing Partner, Pharos ... that all leading finan- cial advisers must master. I was able to communicate how my back- ground in math and economics, as well as my internships, had given me skills relevant to the financial advising...

Ngày tải lên: 11/03/2013, 15:28